GCSE Maths Units and Compound Measures: lesson and practice questions

By the end of this chapter you will be able to

• Change between metric units of length, mass, capacity and time
• Convert area and volume units such as cm² to m²
• Use imperial units and currency with a given conversion factor
• Solve speed, distance and time problems, including km/h and m/s
• Use density, pressure, rates of pay and unit prices
• Recognise and use direct and inverse proportion in tables, graphs and equations
• Interpret the gradient of a straight-line graph as a rate of change

You should already know

• Multiplying and dividing by 10, 100 and 1000 (Chapter 1)
• Decimals and rounding (Chapter 4)
• Fractions of amounts (Chapter 3)
• Ratio and unitary method (Chapter 15)

Where this leads

• Straight-line graphs and rates of change (Chapter 12)
• Volume and surface area (Chapter 19)
• Similar shapes: length, area and volume scale factors (Chapter 21)
• Gradients under graphs (Chapter 25)